| Customization: | Available |
|---|---|
| CAS No.: | 61-90-5 |
| Formula: | C6h13no2 |
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Leucine (symbol Leu or L) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH3+ form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO− form under biological conditions), and a side chain isobutyl group, making it a non-polar aliphatic amino acid. It is essential in humans, meaning the body cannot synthesize it: it must be obtained from the diet. Human dietary sources are foods that contain protein, such as meats, dairy products, soy products, beans and other legumes.
| Item | Specifications | Results |
| Appearance | White crystalline powder | Conforms |
| Specific Rotation[α]20/D | 14.5°~ 16.0° | 15.4° |
| Chloride(CL) | ≤0.05% | <0.05% |
| Sulphate(SO42-) | ≤0.03% | <0.03% |
| Iron(Fe) | ≤30ppm | <30ppm |
| Residue on ignition | ≤0.2% | 0.05% |
| Heavy metal(Pb | ≤15ppm | <15ppm |
| Assay | 98.5%~101.5% | 99.3% |
| Loss on drying | ≤0.30% | 0.14% |
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